PG32UCDM: Video signal issues (White image flicker & black screens)

[ScaryBandana]

Hi,

I would like to point out a problem with the PG32UCDM. I have issues with the image signal on several units of the PG32UCDM. A white artifact often appears on the screen for a brief moment (one second), which I suspect, depending on the refresh rate, either only appears in the top right corner (120Hz) or the entire lower half of the screen (240Hz). Sometimes the monitors lose the signal completely for a brief moment. As soon as the signal comes back, the Dolby Vision logo appears again in the top right. I have experienced the problem with 3 PG32UCDM units (MCM105 & MCM106 firmware). The issue occurs randomly on one screen at a time. The problem occurs with the cables that came with the monitors and also when AMD FreeSync is disabled.
A Reddit user also reports he has the same issue with his unit. I have attached a picture from the Reddit user that shows the glitch. The Reddit user reports that he is experiencing glitches via HDMI1. For me, the issue occurs via DisplayPort (I rarely use HDMI, so I can't say whether the isue also occurs with my PG32UCDMs via HDMI). Both I and the Reddit user have Dolby Vision enabled. I also had the issues before the Dolby Vision update (MCM105). My PG32UCDMs are connected to an AMD Radeon RX 7900 XTX via DisplayPort. The Reddit user connected his PG32UCDM to an Xbox Series X via HDMI.

Link to the Reddit post: https://www.reddit.com/r/ASUSROG/comments/1gu7gf8

[ScaryBandana]

Update on my part: I have been using one of my PG32UCDMs with a MacBook Pro M1 via USB-C for the last few days. The static problem did not occur there. Since the pure desktop environment of macOS does not support HDR, HDR was disabled according to the monitor OSD. I have now reconnected my PG32UCDM to my RX 7900 XTX and due to AMD Eyefinity HDR was also disabled there (HDR Off was also displayed in the monitor OSD), but the static problem is currently occurring there. Monitor runs at 120Hz due to Eyefinity. Firmware is MCM108.

I'm no longer sure if the problem is really due to Dolby Vision as currently suspected. I still think I remember that the static problem occurred before the DV update was even released, but I don't want to present it as fact now as I'm not 100% sure.

Update: A few days ago, I added another PG32UCDM to my setup, this one is connected to the RX 7900 XTX with the included USB-C cable, DolbyVision was activated as HDR mode in the monitor OSD, but in the information bar at the top the HDR mode was HDR (Console HDR), i.e. HDR10. This unit also has the problem with the static noise in the top right corner and black screens (monitor runs at 120Hz due to bandwidth limitation). The monitor was delivered with firmware MCM105, which is why I assume that the monitor comes from a relatively recent batch.

[Xaxxus1]

I am having a similar issue. I get these white lines flickering across the screen then the screen goes black. It doesnt reconnect until i manually power off the monitor and power it back on.

It seems as though its related to windows HDR. If I press win + alt + b (the hotkey for toggling HDR) the monitor reconnects. But only temporarily.

This happens almost constantly.

Im running the latest drivers and firmware (108).

I honestly have no idea what to do now. I no longer have the box for the monitor so I cant really return it to amazon.

[Jabao18]

I've had this monitor pretty much since release and I also can confirm with Dolby Vision Enable I get that flicker anytime I expand any window on my PC. I thought we would have a resolution to this issue at this point. Admin please direct this to the right people. This happens with DP cable or HDMI with Dolby Vision Enabled. I am currently on the latest firmware MCM108

[Xaxxus1]

looks like the megathread for this issue is here: PG32UCDM black screen during game sessions!!. We should probably contribute there.

[Jabao18]

That thread seems unrelated to the dolby vision bug discussed here. Dolby vision was added at a later date so definitely unrelated to that discussion.

[Xaxxus1]

I think it's the same issue. Whether I use dolby or HDR10, I get screen flickering followed by black screen. Sometimes its a white line flickering, sometimes its a big block of static like depicted in the screenshots above.

https://youtu.be/0wBQ4cq4RkY

[Jabao18]

Suspecting my issue is unrelated to that. This bug for me only became present when dolby vision was added in a firmware update. Dolby vision logo appears in top right anytime a windows browser is in full screen mode and continuously loops. I will try to upload a video here later it possible. Either way there was issues that need to be addressed. This occurs with DP connections or hdmi. XPS 8950 AMD Radeon RX6600XT. Windows 11.

[999jacky]

i think this is fireware bug,

i just got my montior from rma, but issue still there

in my case, switch dobly vission, even watch SDR video and turn off windows HDR,still happen

however, switch HDR10 there are no problem

 

[Jabao18]

Correct this is only with Dolby Vision Enabled. HDR10 does not cause this behavior at least for me. 

[Jabao18]

Update to my previous post. Apparently I was unaware the issue with Dolby Vision is on the Windows side. It is not compatible with Windows (yet) at least not natively. Someone commented on my youtube video and I started doing research and theres pages upon pages regarding dolby vision and windows. Bummer